Running on E

My fatigue and exhaustion are at an all time high. Making a human really takes everything out of you!! So I need to know, is coffee safe to drink while pregnant? I’ll be 7 weeks tomorrow if that makes a difference. I keep falling asleep at my desk at work or really any time I close my eyes for longer than 0.5 seconds lol. Does this fatigue and exhaustion last the entire pregnancy? Also, are cramps normal? Sometimes I have some really bad cramps but I have 0 bleeding so I don’t worry too much but I just want to make sure that’s okay.

Thanks in advance for your advice :))